Isolation of 1,2,4,3-Triazaborol-3-yl-metal (Li, Mg, Al, Au, Zn, Sb, Bi) Derivatives and Reactivity toward CO and Isonitriles
作者:Wei Lu、Haitao Hu、Yongxin Li、Rakesh Ganguly、Rei Kinjo
DOI:10.1021/jacs.6b03432
日期:2016.5.25
1,2,4,3-triazaborol-3-yl-metal complexes (Al; 5, Au; 6, Zn; 7, Mg; 8, Sb; 9, and Bi; 10). 3 reacted with CO (1 atm) and various isonitriles under ambient condition, and mechanistic study suggests that the reactions with CO and aryl isonitriles proceed via an insertion of CO and isonitrile carbon into the B-Li bond followed by isomerization to yield transient carbene species, one of which was confirmed
合成并充分表征了 3,4-二氢-2H-1,2,4,3-triazaborol-3-yl-lithium 3。(11)B NMR 光谱、X 射线衍射分析和计算研究揭示了 B-Li 键的离子性质,实际上 3 显示出亲核性质,允许制备一系列 1,2,4,3-triazaborol -3-基-金属络合物(Al;5,Au;6,Zn;7,Mg;8,Sb;9 和 Bi;10)。3 在环境条件下与 CO (1 atm) 和各种异腈反应,机理研究表明,与 CO 和芳基异腈的反应是通过将 CO 和异腈碳插入 B-Li 键然后异构化产生瞬态卡宾物种来进行的,其中之一通过 S8 诱捕确认。使用PhNC,化合物5和7·(thf)与异腈交换了与金属中心配位的THF分子,